Basic perception functions (like Adaptive Cruise Control ACC, Lane Keeping Assist LKA, and Automatic Emergency Braking AEB) rely on the vehicle's local radar and cameras, and can operate normally overseas. However, advanced features that heavily depend on high-precision maps and cloud data (like Navigation on Autopilot NOA and Full Self-Driving FSD) cannot be activated overseas.

Key documents to request and verify: 1. Export declaration (报关单): proves the car legally left China. Check the VIN, model and exporter name match the car. 2. Commercial invoice: must match your payment amount; customs uses it to assess duties. 3. Bill of lading: confirm the consignee is you or your agent, and the VIN/container number is correct. 4. Certificate of origin: needed for tariff preferences in some markets. 5. Condition/inspection report: ideally from an independent third party, with photos and dates. Verification tips: cross-check the VIN on every document — any mismatch causes customs holds. Ask your destination customs broker to review scanned copies before the car ships, and release the final payment only after documents pass that review. A legitimate exporter will provide all of these without hesitation.

Rust is one of the most underestimated problems in remote buying. Request specific evidence: photos of the underbody, wheel arches, door sills, and around the windshield seal; close-ups of suspension mounting points; and ideally paint thickness readings across panels (factory paint is typically 80-120μm; heavy patches suggest bodywork). Northern Chinese cars may have winter road-salt corrosion; coastal cars can show surface rust on exposed metal. Surface rust on exhaust and bolts is normal—structural rust on frame rails, subframes, or brake lines is a deal-breaker, especially if the car is headed to a humid or coastal market. Have the inspector tap suspicious areas during the video call: flaky or bubbling metal sounds hollow. Walk away if the seller refuses underbody photos.